DrugPatentWatch Database Preview

Details for Patent: 5,931,809

Summary for Patent: 5,931,809

Title:

Epidural administration of therapeutic compounds with sustained rate of release

Abstract:

A drug delivery system provides sustained-release delivery of therapeutic biologically active compounds administered epidurally. In the preferred embodiment the biologically active compound is an opioid, which is encapsulated within the non-concentric internal aqueous chambers or bilayers of multivesicular liposomes. The opioid is released over an extended period of time when the liposomes are introduced epidurally as a single dose for sustained analgesia.

Non-Orange Book Patents for Patent: 5,931,809

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patents (shown in the main table above) generic applications
must certify that the listed patents are expired, invalid, or
will not be infringed by generic entry.

The non-Orange Book patents listed
below do not require formal certifications, so they do not
automatically impede generic entry. Instead, they represent
potential opportunities for branded firms to block generic
entry through patent infringment challenges.

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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.

International Patent Family for Patent: 5,931,809

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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws,
it is advisable to have patent counsel verify freedom to operate.

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